What are the answer choices? The way this question is stated it seems like answer choices should have been add on. :)
If there are no answer choices I think his quad and hurdlers stretches means he is stretching his legs to run :)
Hope this helps
Answer:
immune system nervous system and endocrine system
Your body systems work together to keep you alive. Each of these systems is made up of organs
with specific functions. The structure of these organs and the cells of which they are made make
them well suited to their function. An important function of your body systems is to supply your cells
with energy and nutrients, and to remove wastes that are produced, thats the best I
have.
